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二滩水电站水轮机埋件及导水机构由GE公司制造 ,安装工艺由GE公司制定。埋件主要部件均为分瓣件 ,需现场组焊 ,埋件材质多为含碳量较高的高强钢 ,厚度大 ,焊接时对线能量、焊道宽度、预热温度、层间温度、后热温度、后热时间均有严格的要求。埋件安装后 ,经 3 46MPa水压试验。同时二滩电站的水轮机埋件和导水机构中还采用了一些独特结构 ,如座环止裂孔 ,与座环、基础环焊接相连的连接板 ,现场焊接的座环密封环 ,呈搭接结构的凑合节 ,导叶金属密封和导叶轴止推等结构 ,安装简便 ,运行效果良好
Ertan Hydro Turbine embedded parts and water guide by the GE manufacturing company, the installation process by the GE company. The main parts of the embedded parts are all divided pieces, and the spot welding is required. The material of the embedded parts is mostly high strength steel with high carbon content. The thickness is large, the energy of the welding line, the width of the weld bead, the preheating temperature, After the hot temperature, after the hot time has strict requirements. After the installation of embedded parts, after 3 46MPa hydraulic test. At the same time, Ertan Hydropower Station’s turbine parts and water diversion agencies also used a number of unique structures, such as the seat ring crack hole, with the seat ring, the base ring welding connected to the connecting plate, the site welding ring seat ring ring was lapped structure The make-up section, the guide vane metal seal and guide vane shaft thrust and other structures, easy installation, good running effect